CN101965449A - Method and device for injecting fuel into the combustion chamber of an internal combustion engine - Google Patents

Method and device for injecting fuel into the combustion chamber of an internal combustion engine Download PDF

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Publication number
CN101965449A
CN101965449A CN2008801036836A CN200880103683A CN101965449A CN 101965449 A CN101965449 A CN 101965449A CN 2008801036836 A CN2008801036836 A CN 2008801036836A CN 200880103683 A CN200880103683 A CN 200880103683A CN 101965449 A CN101965449 A CN 101965449A
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CN
China
Prior art keywords
fuel
pressure
control valve
valve
flushing
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Pending
Application number
CN2008801036836A
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Chinese (zh)
Inventor
M·博恩豪普特
J·劳塞克
C·梅斯尔
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of CN101965449A publication Critical patent/CN101965449A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0667—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature acting as a valve or having a short valve body attached thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/043—Injectors with heating, cooling, or thermally-insulating means with cooling means other than air cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
    • F23D11/26—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed
    • F23D11/28—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed with flow-back of fuel at the burner, e.g. using by-pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • F02M2700/077—Injectors having cooling or heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

In a method for injecting fuel into the combustion chamber of an internal combustion engine, the fuel is fed by at least one prefeed pump from a tank to at least one high-pressure pump, and the high-pressure fuel which is fed by the high-pressure pump is supplied to the injector, wherein the injector has an injection nozzle with an axially movable nozzle needle which protrudes into a control chamber which can be fed with fuel under pressure, the pressure of which control chamber is controlled by means of a control valve which opens or closes at least one inflow or outflow duct for fuel. Between the prefeed pump and the high-pressure pump, a partial quantity of the fuel is branched off as a flushing quantity and is supplied to a flushing duct of the injector, wherein the flushing quantity is supplied directly to the control valve such that the flushing quantity at least partially flows through the control valve and preferably mixes with the fuel from the inflow or outflow duct.

Description

Method and device in a kind of firing chamber that fuel is sprayed into internal-combustion engine
The present invention relates to a kind of fuel be sprayed into method in the combustion chambers of internal combustion engines, under this method, fuel is flowed to high-pressure service pump by preceding transfer pump from fuel tank, and the fuel under high pressure of being carried by high-pressure service pump is sent in the sparger.Sparger has the jet blower with an axially displaceable jet blower needle, and the jet blower needle be dipped into one can be by in the control chamber of feed-in fuel under pressure, here, its pressure opens or closes the control valve that at least one fuel advances/go out passage by one and is controlled.In addition, the invention still further relates to and a kind of fuel is sprayed into device in the combustion chambers of internal combustion engines.
The sparger of the above type often is used in common rail-ejecting system.
The sparger of common rail system that is used for heavy fuel is sprayed into combustion chambers of internal combustion engines is known with various structural form.Under case of heavy, need heavy oil is heated to 150 degrees centigrade, so that it reaches required injection viscosity.And when fuel contained the solid particle that has grinding in a large number and is in the condition of high temperature, abrasive action will be aggravated naturally, and then had influence on functional reliability.
A sparger that is total in rail-ejecting system has various part in principle, and these parts are fixed together by a nozzle locking nut again usually.Injector nozzle originally contains a nozzle needle, and the nozzle needle can move axially in nozzle body, and has a plurality of Free Surfaces, can flow to the top of nozzle needle from the nozzle ante-chamber along these surperficial fuel.Nozzle needle self also has a flange, a pressure spring in this flange upper support.The nozzle needle reaches in the control chamber that can be supplied fuel under pressure.Advance/go out fuel channel and link to each other with this control chamber by the import/export throttle valve respectively, and in the chamber, under the spring force acting in conjunction of pressure and pressure spring, make the nozzle needle remain on its closed position.Pressure in the control chamber is by electromagnetic valve, and solenoid valve is all opened by electromagnet as a rule.The wiring situation of correspondence under, opens solenoid valve will make fuel flow out through throttle valve, the nozzle needle extend into the end face in the control chamber, therefore hydraulic pressure confining force suffered on it will reduce, thereby the nozzle needle is unlocked.In this way, fuel can reach in the firing chamber of motor through nozzle bore.
Except speed control muffler, always also design has inlet throttle valve, and the flow difference between them is determining the opening speed of nozzle needle.When solenoid valve was closed, the flow pass of fuel was stopped up by speed control muffler, thereby under the inlet throttle valve action, will form pressure again in the control chamber, so that the nozzle needle is closed.
Especially, for large-scale diesel engine, the high-energy based on its used fuel, required flow area and solenoid valve energising are brought into big heat load may occur on the valve.Therefore, for avoiding the fire damage of valve, may need extra cooling processing.
For the temperature adjustment or the cooling of sparger, WO 2006/021014 A1 has made exemplary known, promptly arranges extra heavy oil or machine fuel channel in sparger, realizes cooling off purpose.
Now, the present invention will be conceived to, and the method that is used for fuel being sprayed into combustion chambers of internal combustion engines of aforementioned type is done following improvement, promptly improve control valve, especially the cooling of solenoid valve.For solving this task, mainly will do following carrying out according to the present invention, promptly between preceding transfer pump and high-pressure service pump extension fuel as flushing dose, and further be transported in the irrigation channel of sparger, flushing dose can directly flow to control valve, the control valve so that flushing dose to small part is flowed through, thus advantageously with from the fuel that advances/go out passage mix mutually.In addition, flushing dose can be guided by being used for the heat exchanger to the flushing dose temperature adjustment.From advancing/go out the fuel that passage flows out, after the low pressure level that reduces pressure, must have very high temperature, by comparison, temperature by the flushing dose of drawing between preceding transfer pump and the high-pressure service pump is then obviously much lower, mixing by this two class A fuel A, middle fuel temperature will be lighted obvious reduction from mixing, thereby can significantly reduce the heat load of solenoid valve.By flushing dose with from advancing/go out the formed mixture of fuel that passage flows out, the control valve of partly flowing through to I haven't seen you for ages, therefore, the heat load of solenoid valve can obviously reduce.
According to mode involved in the present invention, need not expensive member (Einbauten), just can make solenoid valve realize good cooling, promptly only needing just is enough to make that by distributing small amount of fuel between preceding transfer pump and the high-pressure service pump temperature in solenoid valve zone significantly reduces.Here, flushing dose is guided through heat exchanger and is used for flushing dose is carried out preheating.Method can be regulated cooling performance in this way, i.e. cooling or the preheating that comprises the amount of washing that liquidates handled in temperature adjustment.In addition, also can solenoid valve be heated simultaneously such as before engine start.
According to a kind of advantageous method, flushing dose is transported to control valve in the valve seat area of valve element.Under this method, the flushing dose of drawing between preceding transfer pump and high-pressure service pump directly with from the fuel that advances or go out the passage outflow mixes in the control valve ingress, mutually so that the basic upper reaches of the fuel that has been cooled is through the The whole control valve.Here, flushing dose is the armature pivot chamber of preferential flow through control valve, thereby, particularly, can play significant cooling action to the part under the high heat load of being in of solenoid valve.
The adjusting of cooling performance, available following with extremely beneficial method realization, promptly preferably by throttle valve or flushing valve, to regulating by the flushing dose of drawing between preceding transfer pump and high-pressure service pump.Here, can advantageously regulate, and the temperature of solenoid valve or fuel can be obtained at the electromagnetic valve outlet place by temperature transducer according to the measured value of temperature transducer.Method can realize temperature regulation especially simply in this way.
For guaranteeing sufficiently high stress level is arranged, thereby can be used for the flushing and the cooling of solenoid valve, preferred adopt following measure here, even fuel is issued to the overvoltage of 5-10 crust in preceding transfer pump effect by the part measurer of the fuel of drawing between preceding transfer pump and the high-pressure service pump.
Further object of the present invention is, creates a kind of being used for fuel is sprayed into the indoor device of combustion in IC engine, and in this device, can better cool off solenoid valve.Thus, this device has one and is used for the preceding transfer pump from the fuel tank transfer the fuel high-pressure service pump, and a sparger.Here, the fuel under high pressure that the fuel of being carried by preceding transfer pump is sent to high-pressure service pump and is carried by high-pressure service pump is transported in the sparger.This sparger has a nozzle, and nozzle have one can axially movable nozzle needle.The nozzle needle reaches in the control chamber that can present fuel under pressure, and its pressure can be controlled by a control valve that advances/go out passage that opens or closes at least one fuel.According to the present invention, the main outstanding part of this device is, between preceding transfer pump and high-pressure service pump, be connected to the branch line that links to each other with the sparger irrigation channel, and irrigation channel leads to the control valve place, therefore, flushing dose to the small part control valve of flowing through, and advantageously mix mutually with the fuel that advances/go out passage by fuel.In addition, branch line can be led over-heat-exchanger (31) and is used for flushing dose is carried out the temperature adjustment processing.
The favourable improvement design of this injection apparatus can be drawn by each dependent claims, and corresponding advantage is in conjunction with setting forth in the method involved in the present invention.
To the present invention further be set forth by means of an embodiment who represents with schematic representation below.Wherein, Fig. 1 has showed a modular structure diagram of rail-ejecting system altogether, and Fig. 2 has showed that along the sectional drawing of II-II hatching line gained among Fig. 1, Fig. 3 has showed along the sectional drawing of III-III hatching line gained among Fig. 2.
Fig. 1 has showed a structure diagram that is total to rail-ejecting system according to modularization of the present invention.Fuel is extracted out from fuel tank 1 by preceding transfer pump 2, and rises to desired system pressure under high-pressure service pump 3 effects, and is transported in the sparger 4.Sparger 4 is by 7, one injector bodies 8 that are equipped with high-pressure accumulator (not drawing among the figure) of 6, one solenoid valves of 5, one throttle flaies of a nozzle, and the nozzle locking nut 9 that component are remained to together constitutes.When state of rest, solenoid valve 7 is closed, thereby fuel under high pressure can enter in the control chamber 13 of nozzle 5 through translot 11 and inlet throttle valve 12 from pressure hole 10, and from the go out stream of control chamber 13 through speed control muffler 14, then be plugged at valve seat 15 places of solenoid valve 7.The system pressure that exists in control chamber 13 and the power of nozzle springs 16 are pressed onto jet blower needle 17 on the nozzle group valve needle stand 18 altogether together, thereby spray-hole 24 is closed.
When solenoid valve 7 is handled, be exactly the power that electromagnet 25 is triggered and electromagnetic valve element 27 is overcome solenoid valve spring 26, from solenoid valve valve seat 15, lift, but the fuel free stream is crossed solenoid valve valve seat 15, reach fuel from control chamber 13, through speed control muffler 14, solenoid valve armature chamber 19, flow discharging seam 20, unloading hole 21 and low pressure hole 22 are flowed back in the fuel tank 1.In control chamber 13, regulate the balance pressure that flow cross determined by inlet throttle valve 12 and speed control muffler 14.It is very little, thus the system pressure in the nozzle chambers 23 the jet blower needle 17 that can vertically move guiding in nozzle body 32 can be opened so that spray-hole 24 is released, thereby realize spraying.
Be flooded with the absolute pressure of 1-2 crust in low pressure hole 22, therefore, fuel is because system pressure, the inlet throttle valve 12 of flowing through, and its temperature of speed control muffler 14 and solenoid valve seat 15 will significantly improve.In addition, what occur on the electromagnet 25 electricity also will become extra thermal source with loss magnetic, thereby at first at big flow, when in fuel preheating (as heavy oil) and solenoid valve 7, having the high workload electric current, may produce crucial component load.
Fig. 2 has showed the sectional drawing by the sparger 4 of Fig. 1 section gained.Here can also see flushing hole 28 of the present invention.
Fig. 3 has showed the sectional drawing by the sparger 4 of Fig. 2 section gained, and this sparger has flushing fuel supply system of the present invention.T type section 29 places between preceding transfer pump 2 and high-pressure service pump 3, a part is in the fuel of the overvoltage of 5-10 crust herein and is gone out by shunting.Flushing dose can be controlled by flushing valve 30, and can carry out temperature adjustment at heat exchanger 31 places and handle.Shunt volume will directly be directed to solenoid valve seat 15 places by flushing hole 28, and here flushing dose mixes mutually with the controlled quentity controlled variable that flows out from speed control muffler 14.Because the temperature difference between flushing dose and the controlled quentity controlled variable is bigger, controlled quentity controlled variable will be subjected to significant cooling action, thereby, to compare with the sparger of traditional no washing capacity, the temperature in the armature chamber 19 is obviously much smaller.Therefore, in running, temperature load will significantly reduce for the component of solenoid valve 7, like this, be prolonged in the life-span, on the other hand again can by select other, still less temperature-resistant material reduces cost.In addition, can realize preheating of flushing dose by selecting heat exchanger 31 suitably.When for example heavy oil is used as fuel when using, availablely through pre-warmed flushing dose solenoid valve 7 is carried out temperature adjustment and handle, with the startup of this booster engine.

Claims (12)

1. be used for fuel is sprayed into the method for combustion chambers of internal combustion engines, wherein fuel is carried at least one high-pressure service pump from fuel tank by transfer pump before at least one, and give sparger by the fuel under high pressure that high-pressure service pump is carried, this sparger has nozzle, nozzle has axially displaceable nozzle needle again, the nozzle needle reaches in the control chamber that can present with under pressure fuel, the control valve that its pressure advances/go out passage by at least one that opens or closes fuel is controlled, it is characterized in that, between preceding transfer pump and high-pressure service pump, the part amount that branches out fuel is used as flushing dose and guides in the irrigation channel of sparger, and flushing dose is directly delivered to control valve, the control valve thereby flushing dose to small part is flowed through, and advantageously with from the fuel that advances/go out the passage outflow mix mutually, flushing dose is guided through heat exchanger and handles to carry out temperature adjustment.
2. method as claimed in claim 1 is characterized in that flushing dose is sent to control valve on the valve seat area of valve element.
3. as the method for claim 1 or 2, it is characterized in that the flow through armature chamber of control valve of flushing dose.
4. as the method for claim 1,2 or 3, it is characterized in that,, regulate the flushing dose of being drawn by between preceding transfer pump and the high-pressure service pump preferably by throttle valve or flushing valve.
5. as the method for claim 1 to 4, it is characterized in that fuel pressure is supplied to the overvoltage of 5-10 crust by preceding transfer pump.
6. be used for fuel is sprayed into the device of combustion chambers of internal combustion engines, especially for the device of implementing as method as described in one of claim 1 to 5, include at least one and be used for preceding transfer pump that fuel is exported from fuel tank, at least one high-pressure service pump and sparger, give high-pressure service pump by the fuel of preceding transfer pump conveying and reach the fuel under high pressure of carrying by high-pressure service pump, be sent in the sparger, this sparger has nozzle, and nozzle have can axially movable nozzle needle, the nozzle needle reaches in the control chamber that can present with under pressure fuel, and its pressure advances/goes out the control valve may command of passage by at least one that opens or closes by fuel, it is characterized in that, between preceding transfer pump (2) and high-pressure service pump (3), be connected to the branch line that links to each other with irrigation channel (28) on the sparger (4), and irrigation channel (28) leads to control valve (7), the control valve (7) thereby flushing dose to small part is flowed through, and advantageously with by the fuel that advances/go out passage (14) outflow mix mutually, in addition, guiding is handled flushing dose is carried out temperature adjustment by heat exchanger (31) on the branch line.
7. device as claimed in claim 6 is characterized in that, branch line is at the location Access Control valve (7) of the valve seat (15) of valve element.
8. as the device of claim 6 or 7, it is characterized in that irrigation channel (28) is designed to the hole in the control valve (7).
9. as the device of claim 6,7 or 8, it is characterized in that branch line has the mechanism of control flushing dose, as throttle valve or flushing valve (30).
10. as the device of one of claim 6 to 9, it is characterized in that, in the branch line Access Control valve (7), thereby can make flushing dose flow through the armature chamber (19) of control valve (7).
11. the device as one of claim 6 to 10 is characterized in that, preceding transfer pump (2) is used to supply the 5-10 fuel of crust.
12. the device as one of claim 6 to 11 is characterized in that, control valve (7) is designed to solenoid valve.
CN2008801036836A 2007-08-20 2008-08-19 Method and device for injecting fuel into the combustion chamber of an internal combustion engine Pending CN101965449A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0129407A AT505666B1 (en) 2007-08-20 2007-08-20 METHOD AND DEVICE FOR INJECTING FUEL INTO THE COMBUSTION ENGINE OF AN INTERNAL COMBUSTION ENGINE
ATA1294/2007 2007-08-20
PCT/AT2008/000293 WO2009023887A1 (en) 2007-08-20 2008-08-19 Method and device for injecting fuel into the combustion chamber of an internal combustion engine

Publications (1)

Publication Number Publication Date
CN101965449A true CN101965449A (en) 2011-02-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2008801036836A Pending CN101965449A (en) 2007-08-20 2008-08-19 Method and device for injecting fuel into the combustion chamber of an internal combustion engine

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Country Link
US (1) US8708247B2 (en)
EP (1) EP2183477B1 (en)
JP (1) JP2010537106A (en)
KR (1) KR101234161B1 (en)
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CN112761827A (en) * 2021-01-27 2021-05-07 宁波盛煜智能科技有限公司 Gas nozzle with variable sealing sectional area

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